---
title: "Heikikker"
description: "Rana arvalis — Amfibieën. The moor frog (Rana arvalis) is a slim, reddish-brown, semiaquatic amphibian native to Europe and Asia."
canonical: https://animalchecklist.com/nl/animal/moor-frog
last_updated: 2026-09-20
---

# Heikikker

> Rana arvalis — Amfibieën. The moor frog (Rana arvalis) is a slim, reddish-brown, semiaquatic amphibian native to Europe and Asia.

- Scientific name: *Rana arvalis*
- Category: `amphibians` (Amfibieën)
- Habitats: `grassland` (Weiden en velden), `freshwater` (Meren en rivieren)
- iNaturalist observations: 11330
- Wikidata: [Q44324](https://www.wikidata.org/wiki/Q44324)
- iNaturalist taxon: [25488](https://www.inaturalist.org/taxa/25488)

## Names

- en: Moor Frog
- de: Moorfrosch
- es: Rana de Páramo
- fr: Grenouille des champs
- nl: Heikikker
- pl: Żaba moczarowa

## Countries with the most observations

RU (6024), DE (1100), DK (697), PL (657), UA (544), FI (259), SE (238), LT (186), KZ (149), BY (135), NL (133), AT (80)

## Summary

The moor frog (Rana arvalis) is a slim, reddish-brown, semiaquatic amphibian native to Europe and Asia. Moor frogs are known for their ability to freeze solid and survive thawing. The frog makes use of various cryoprotectants i.e. antifreeze that decrease its internal freezing temperature. The species is distributed over a large range, covering a significant portion of Eurasia. Male moor frogs are known to turn blue temporarily during the height of mating season. This coloration is assumed to signal a mate's fitness. Moor frogs typically mate through multimale amplexus, a form of polyandry.
The moor frog spawns its…

Text: Wikipedia (en), CC BY-SA 4.0 — https://en.wikipedia.org/wiki/Moor_frog

## Photo

![Heikikker](https://animalchecklist.com/img/animals/moor-frog/medium.jpg)

Photo: Dorota Wrońska · CC0 · inaturalist — https://www.inaturalist.org/observations/47964363

## Machine access

`GET https://animalchecklist.com/api/v1/animals/moor-frog?lang=nl` — see [openapi.json](https://animalchecklist.com/openapi.json).